Two trends in the evolution of early humans are… A Increasing hair and decreasing skull volume.

B Increasing arm to body ratio and decreasing height.

C Increasing skull volume and decreasing hair.

D Increasing height and stable skull volume.

Me the formula cacl2 represents the compound

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water